Product characteristics: This product is mainly used for sound absorption purposes, with excellent effects on medium to high frequencies and certain sound insulation functions; The product is shipped using compression. After receiving the product, please open the packaging and let it fully rebound for 24-48 hours before use; This product does not come with adhesive backing and requires adhesive to be purchased online; Product Scope of Application:1. Noise reduction in entertainment venues: KTV, dance , recording rooms, live streaming rooms, audition rooms, audio and video rooms, piano rooms, cinemas, conference rooms, studios, television stations, sports venues, exhibition , and other sound-absorbing and thermal insulation. 2. Equipment room noise reduction: sound absorption and insulation for the ship's cabin, engine room, mechanical equipment, and pump room in the engine room. 3. Home office noise reduction: walls, ceilings, roofs, partitions, mezzanine, and other sound-absorbing insulation can be combined with sound-absorbing doors, sound-absorbing walls, and sound-absorbing Color: Black Material: Polyurethane Package Contents: 6 x sound-absorbing treatment pads Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.